(上海现代建筑设计集团有限公司  200041)
【提要】 以某大型单建式地下车库工程的逆作法设计为背景，介绍了主体工程地下结构与支护结构相结合领域方面的研究与实践，以及在主体工程地下结构与支护结构相结合设计中，两墙合一、水平结构体系和竖向支承系统的设计原则和方法。提出了解决关键技术问题的对策。希望能促进主体工程地下结构与支护结构相结合技术(逆作法)的进一步完善与发展。
【关键词】  支护结构与主体结构相结合  两墙合一  一柱一桩  不均匀沉降控制
Design and Practice of Largescale Individual Underground Garage with Topdown  Construction Method/Wang Weidong，Xu Liang，Huang Shaoming(Shanghai Xiandai Architectural Design Group Co.,Ltd.,Shanghai 200041，China)
Abstract:Based on the design of a largescale individual underground garage with topdown construction method,research and practice on  combination of underground main structure and retainingbracing system for excavation are introduced.The design principle and method to take retainingbracing system for excavation including diaphragm retaining wall and inner bracing system as underground main structure,as well as countermeasure of key technical problems are also presented.It is hoped to promote further improvement and d
evelopment of technology in combination of underground main structure and retainingbracing system for excavation (topdown construction method).
Keywords:underground main structure; retainingbracing system; diaphragm retaining wall
；one pile supporting one column；differential settlement control